xref 

<div xmlns="http://www.w3.org/1999/xhtml">
  <h3>X(cross) Reference</h3>
</div>

Element Information

Model

bold | fixed-case | italic | monospace | overline | roman | sans-serif | sc | strike | underline | ruby | named-content | styled-content | sub | sup
Children: bold, fixed-case, italic, monospace, named-content, overline, roman, ruby, sans-serif, sc, strike, styled-content, sub, sup, underline

Attributes

QName Type Fixed Default Use Inheritable Annotation
alt xsd:string optional
id xsd:ID optional
ref-type restriction of xsd:NMTOKEN optional
rid xsd:IDREFS optional
specific-use xsd:string optional
xml:base xs:anyURI optional 
<div>
  <h3>base (as an attribute name)</h3>
  <p>denotes an attribute whose value provides a URI to be used as the base for interpreting any relative URIs in the scope of the element on which it appears; its value is inherited. This name is reserved by virtue of its definition in the XML Base specification.</p>
  <p>See
    <a href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a>for information about this attribute.</p>
</div>
xml:lang union of(xs:language, restriction of xs:string) optional 
<div>
  <h3>lang (as an attribute name)</h3>
  <p>denotes an attribute whose value is a language code for the natural language of the content of any element; its value is inherited. This name is reserved by virtue of its definition in the XML specification.</p>
</div>
<div>
  <h4>Notes</h4>
  <p>Attempting to install the relevant ISO 2- and 3-letter codes as the enumerated possible values is probably never going to be a realistic possibility.</p>
  <p>See BCP 47 at
    <a href="http://www.rfc-editor.org/rfc/bcp/bcp47.txt">http://www.rfc-editor.org/rfc/bcp/bcp47.txt</a>and the IANA language subtag registry at
    <a href="http://www.iana.org/assignments/language-subtag-registry">http://www.iana.org/assignments/language-subtag-registry</a>for further information.</p>
  <p>The union allows for the 'un-declaration' of xml:lang with the empty string.</p>
</div>

Used By

Element Groups contrib-info.class, simple-link.class

Source 

<xsd:element name="xref">
  <xsd:annotation>
    <xsd:documentation>
      <div xmlns="http://www.w3.org/1999/xhtml">
        <h3>X(cross) Reference</h3>
      </div>
    </xsd:documentation>
  </xsd:annotation>
  <xsd:complexType mixed="true">
    <xsd:choice minOccurs="0" maxOccurs="unbounded">
      <xsd:group ref="xref-elements"/>
    </xsd:choice>
    <xsd:attribute name="alt" use="optional" type="xsd:string"/>
    <xsd:attribute name="id" use="optional" type="xsd:ID"/>
    <xsd:attribute name="ref-type" use="optional">
      <xsd:simpleType>
        <xsd:annotation>
          <xsd:documentation/>
        </xsd:annotation>
        <xsd:restriction base="xsd:NMTOKEN">
          <xsd:enumeration value="aff"/>
          <xsd:enumeration value="app"/>
          <xsd:enumeration value="author-notes"/>
          <xsd:enumeration value="bibr"/>
          <xsd:enumeration value="boxed-text"/>
          <xsd:enumeration value="chem"/>
          <xsd:enumeration value="collab"/>
          <xsd:enumeration value="contrib"/>
          <xsd:enumeration value="corresp"/>
          <xsd:enumeration value="disp-formula"/>
          <xsd:enumeration value="fig"/>
          <xsd:enumeration value="fn"/>
          <xsd:enumeration value="kwd"/>
          <xsd:enumeration value="list"/>
          <xsd:enumeration value="other"/>
          <xsd:enumeration value="plate"/>
          <xsd:enumeration value="scheme"/>
          <xsd:enumeration value="sec"/>
          <xsd:enumeration value="statement"/>
          <xsd:enumeration value="supplementary-material"/>
          <xsd:enumeration value="table"/>
          <xsd:enumeration value="table-fn"/>
        </xsd:restriction>
      </xsd:simpleType>
    </xsd:attribute>
    <xsd:attribute name="rid" use="optional" type="xsd:IDREFS"/>
    <xsd:attribute name="specific-use" use="optional" type="xsd:string"/>
    <xsd:attribute ref="xml:base" use="optional"/>
    <xsd:attribute ref="xml:lang" use="optional"/>
  </xsd:complexType>
</xsd:element>

Sample

https://orcid.org/0000-0002-5641-0813

Wang

Juanle

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